JPH07165184A - Ship propulsion unit having cleanable washing device accessible from outside - Google Patents

Abstract

PURPOSE: To provide general accessing function to a rotor vane for more cleanliness by allowing at least part of a rotor vane housing to be moved to a water- intake housing so that the interior of a rotor vane housing is accessible from the outside. CONSTITUTION: A stator vane 76 directed to an axis is provided in the stern direction or the left side of a rotor vane 74 to serve for the straight flow of water generated by the rotor vane 74 during operation. The stator vane 76 is formed on a separable portion 58, extending from around the outside to a center hub, the hub having a bearing for pivotally supporting the rotor vane 74 for rotation. With the rotor vane 74 pivotally supported at the separable portion 58 in this way, the separable portion 58 is separated from the fixed stem portion of a rotor vane housing to expose the rotor vane 74 having a number of vanes. The rotor vane 74 is disconnected from a power output driving shaft 78 connecting a power head to the rotor vane 74 by the separation of the separable portion 58 from the stem portion 56.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a marine jet propulsion unit, and more particularly to a marine jet propulsion unit which is extremely high power, is mounted onboard and has an indirect drive. The present invention has the following patent applications:
The title of the invention is "Adjustment Plate Mounting Device for Marine Jet Propulsion Unit", Patent Application for Agent Document No. 57940 filed by Blanchard et al .; The title of the invention is "Jet Pump Mounting Device", Craig Patent application of Agent Document No. 57942 filed by J. et al .; The title of the invention is "jet pump exhaust device", and Agent Document No. 58 filed by Craig et al.
No. 006 patent application.

[0002]

The popularity of jet propulsion units for powering small vessels such as jet skis and large leisure boats continues to grow for a number of reasons. These jet propulsion units are used in place of propeller driven outboard or inboard marine motors.
The jet propulsion unit has the further important advantage of not having a drooping gear case, which allows the vessel to be substantially “floating” above the water surface at high speeds,
Therefore, the operator can keep the vessel substantially horizontal or in the direction of the horizontal plane and rotate the vessel with a small diameter. Another advantage of the marine jet propulsion unit is that the propeller is not exposed, so the vessel can be maneuvered in shallower water without obstructing navigation.

Even though the use of a jet propulsion unit may allow a vessel to maneuver in shallower water, there is a potential for dirt to build up on the unit, and such build-up is generally at the intake of the unit. Caused by uptake of seaweed or other debris. A common design for such jet propulsion units is to provide a grill at the intake.
In such a design, large objects cannot enter the intake channel and eventually reach the rotor, but cannot completely prevent seagrass and other small debris from behaving as described above. It is well known that debris has a significant impact on the performance of the unit as it accumulates on the outside of the grill and eventually reduces, or almost completely blocks, the flow of water through the propeller unit.
In general, if debris enters the intake channel, it will pass through the intake channel to reach the rotor blades and stop the rotor blades to stop the engine.

[0004]

In many prior art designs, access to the internal passages and rotors is often difficult when debris enters the intake port to block the main passage and needs to be removed. Is. Since the power head and gear housing are typically inside the vessel, traditional designs
A removable or openable access or door can be provided inside the vessel to remove debris.
Two problems often arise in connection with the above designs. One of them is that the power head and gear housing are inside the vessel, which may not provide enough room for a person to move to remove debris. Moreover, since this problem is likely to occur during operation, the motor heats up, presenting a safety hazard to those trying to clean it.

Accordingly, a first object of the present invention is to provide a marine propulsion unit having a rotor and a main water channel which can be accessed from the outside of the ship. A related object is to provide a marine propulsion unit that is easily accessible from the outside of the vessel and that provides a general access function to the rotor blades to facilitate its cleaning.

Another related object is to separate the drive shaft of the rotor from the rotor itself. This allows, in particular,
Debris is composed of wire rods, slender plant material, etc.
Or, the removal of debris is greatly facilitated if it could wrap around the rotor. Another object of the invention is to have a rotor housing outside the transom of a vessel, a portion of the housing adapted to be separated from the rest of the housing to expose the inside of the rotor housing. It is to provide a marine propulsion unit which is made to.

Another object of the present invention is to provide a drive shaft connected to a gear train in a gear housing away from the rotor housing when the separable portion of the rotor housing leaves the transom. To provide a rotatable bearing for the rotor blade in. Another object of the present invention is to provide another embodiment in which the separable portion of the rotor housing may be pivoted away from the transom by a hinged connection to one side of the rotor housing.

Another object of the invention is to provide a simple and convenient device for cleaning a water cooling device of a power head, the realization of which is made possible by the separability of the above parts of the rotor housing. A further object of the present invention is to provide a pressure relief device that controls the amount of coolant diverted by the rotor blades towards the power head.

The above and other objects will become apparent from the following detailed description with reference to the accompanying drawings.

[0010]

In order to achieve the above-mentioned object of the present invention, a marine vessel propulsion unit of the present invention has an output drive shaft, and a power head for powering the marine vessel propulsion unit; Rotor means for directing water to the advancing unit; and a water intake housing with mounting structure for the power head; the rotor means having a rotor housing having a passage therein, and the passage mounted on the housing. A rotatable rotor inside the rotor, the rotor housing being connected to the intake housing, the intake housing having an intake passage communicating with a passage of the rotor housing to receive water from an adjacent unit. Further comprising directional controlled discharge nozzle means mounted on the rear of the rotor housing, the nozzle means being capable of adjusting the direction of water discharged from the unit during operation. It is adapted to controlling;
The rotor is removably connected to the power head and at least a portion of the rotor housing is moveable relative to the intake housing so that the interior of the rotor housing is accessible from outside the unit.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Generally speaking, the present invention is directed to an externally accessible, cleanable marine propulsion unit (also commonly referred to in the art as a jet pump or jet propulsion unit). The present invention relates to a rotor blade,
Alternatively, it facilitates efficient and easy removal of debris from the main internal passages of the propulsion unit.

The present invention basically consists of a power head mounted in a gear housing or intake housing,
The output head and the housing are both within the vessel, and the gear housing has an intake for receiving water that is pumped through the main passage of the propulsion unit, which intake is preferably at the bottom of the gear housing and at that location. Extending substantially integrally with the outer surface of the.

The gear housing extends rearwardly to the transom and the rotor housing is connected to the gear housing at approximately the transom. For the purpose of explanation below, the gear housing is generally in front of the transom and the rotor housing is generally in rear of the transom, but it is understood that the transom does not necessarily have to be the boundary line between the two housings. There is a need. Indeed, the gear housing and at least a portion of the rotor housing may be integrally formed during manufacture.

The rotor housing has an aft portion configured to be spaced from the rest of the rotor housing proximate the transom. By separating the separable portion from the rest, the rotor vanes, as well as the main passage in front of or upstream of the rotor blade, including the passage portion within the gear housing, and Access can be made to remove debris from the passageway.
The separable portion slides away from the transom on the sliding rod or, in another embodiment, pivots away utilizing a hinged connection to one side of the rotor housing. Is possible. One or more suitable clamps are
Securely attach the separable part of the rotor housing to the rest.

Another important feature of the invention is that the simple fitting is connected to a conventional water hose and the internal port exposed when the separable part of the rotor housing is separated from the rest of the rotor housing. It can be connected and its fitting is adapted to easily backflow the cooling device of the power head by simply inserting the fitting into the port and opening the hose.

The invention has the particular advantage that cleanability and washability are very easily realized since the separable part is outside the vessel. The propulsion unit is further adapted to steer the vessel by turning horizontally with respect to the transom of the vessel and further comprises a retreat gate which may be moved in or out of the spout during operation. This is effective in changing the injection flow in the backward direction in order to obtain the backward propulsion performance. Moreover, the gate can also be moved to an intermediate position, whereby a part of the injection is reversed and the other part is not, so that a neutral propulsion performance is obtained.

Referring now to the drawings, and in particular to FIG.
A marine jet propulsion unit of one embodiment of the present invention is generally indicated by reference numeral 10. The unit 10 is designed to be mounted inboard on the hull of a ship, preferably a passenger ship. However, the use of this propulsion unit with other suitable vessels is also contemplated. The main components of propulsion unit 10 are a power head 12 generally indicated by the reference numeral 12 and a pump unit 14 generally indicated by the reference numeral 14. The pump unit has a gear housing 16, which is also referred to as an intake housing, which provides a mounting structure for the power head, connects the power head to the rotor blades, and a water intake for the pumped water. including. This preferred embodiment is
Although including a gear housing 16 having a gear train to drive the rotor, the removable rotor housing and regurgitation of the present invention allow for use in a propulsion unit where the power head is directly connected to the rotor. It will be recognized that

The pump unit 14 further comprises a rotor housing 18 on the outside of the vessel, ie, opposite the gear housing 16 with respect to the boat transom 20 (see FIGS. 2, 3 and 5), A retraction gate 22 controlling the orientation of the unit 10 is connected to the rotor housing 18. In one preferred embodiment, the power head 12
Includes an engine block 23, an air silencer 24, a fuel pump 26, a fuel filter 28 connected to a combustion pump, an electrical starter 30 connected to a flywheel assembly 32, and a muffler 34. Conventional 3 cylinder 2
It is a marine power unit for a cycle. In one preferred embodiment, the power head 12 has an output capability in the range of 70 to 90 horsepower, although both lower and higher power grade power units are suitable for use in the present invention. Power head 12 is well known in the prior art and is hereby incorporated by reference in its commonly assigned US Pat.
Drive shaft described in the specification of 08,673 (not shown)
Further has.

Referring to the pump unit 14, the unit includes a gear housing 16 having a bow end 38, a stern end 40, a lower side 42 and an upper side 44. The water intake (not shown) covered with the grill
The water is on the lower side surface 42 that communicates with the main passage 46, the stern side end 40 from the water intake through the gear housing 16, and
Extends to the rotor housing. Transom plate 48
Is located at the stern end 40 and is integrally formed with the gear housing 16 by casting. Exhaust hose 50 delivers power head exhaust through rotor housing 18. The ride plate 52 is vertically spaced apart on the lower side 42 of the housing 16 in a dependent relationship to the lower end 54 of the transom plate 48.

The rotor housing 18 has a bow side portion 56,
Detachable part 5 detachably connected to the bow side part 56
8 and. In the preferred embodiment shown in FIGS. 1, 2 and 5, the separable portion 58 is removably secured by a pair of clamps 60, each pair of clamps including a post 64 secured to the bow side 56. It has a hook portion 62 configured and arranged to engage. Once the clamp 60 is locked, it is preferably biased in the closed position and does not loosen until the operator opens it. The gear shift cable 66 is connected to the retreat gate 22 via the link mechanism 68 and passes through the washer-fitted opening 70 of the transom plate 48.

The gear shift cable 66 has a link mechanism 68.
Is adapted to control the vertical position of the gate 22 and thereby control the propulsion direction of the unit 10.
When the gate 22 is completely raised, the gate 22 is removed from the position where the flow of water discharged from the nozzle portion 72 is blocked. When fully lowered to obstruct the flow, it diverts the flow backwards, thereby propelling the vessel in the reverse direction.

When the unit is operating, the rotor blades
It should be understood that the flow is continuously driven so that it is always flushed through the unit. As shown in FIG. 1, when the gate 22 is partially lowered, a portion of the flow is diverted and the rest is not diverted. This has the effect of obtaining a neutral position. Referring to FIG. 2 for a preferred embodiment, a separable portion 58 is shown with a portion removed to expose a multi-blade rotor blade 74, three of which are shown. To the aft direction of rotor 74, i.e., the left side shown in FIG. 2, is an axially-oriented stationary vane 76 that functions to straighten the flow of water generated by the rotor during operation. A stationary vane 76 is formed in the separable portion 58 and extends from the outer periphery to the central hub, which has a bearing (not shown) that supports the rotating vane for rotation. By supporting the rotor with the separable portion 58, the separable portion can be separated from the fixed portion 56 of the rotor housing.

According to an important aspect of the invention, the separable part 5
8 is separated from the portion 56, so that the rotor blades 74
Is disconnected from the power output drive shaft 78, which is part of the gear train that interconnects the power head to the rotor 74. It will be appreciated that the drive shaft 78 provides a direct connection between the power head and the rotor, or forms part of an indirect connection through the gear train, as is known in the art. Let's do it. The drive shaft 78 is preferably the rotor 7
4 has an axially oriented keyway 80 that cooperatively engages a keyed opening (not shown) at 4, so that the separable portion 58 returns to fit properly into the fixed portion 56, The drive shaft is adapted to engage and drive the rotor blades when the clamp 60 is engaged.

In the preferred embodiment, the separable portion 58.
Has openings in two extensions 82 on either side of the separable portion 58. The elongated rod 84 is fixed to the fixing portion 56 and extends in the stern direction through the opening of the expansion portion 82. As a result, the separable part 58 can slide on the rod between the operable position shown in FIG. 1 and the separated position shown in FIG. The gear shift cable 66 comprises an armor portion 86 within which the cable 66 can move, the armor portion 86 being retained by a retaining member 90 for preventing the outer armor portion 86 from moving in the direction of the cable. It has a mounting portion 88 with an external groove adapted accordingly. Thus, when the retaining member 90 has the mounting portion 88 in place, only the cable 66 can move to reposition the gate 22. The holding member 90 has a movable lock portion that can clamp the mounting portion and separate the mounting portion from the holding member. Upon leaving, the armor is capable of sliding relative to the grommet 70, and the armor has a separable portion 58 so that a person can access the passageway 46 and remove any debris that may be present. There is sufficient slack to be able to slide a sufficient distance from 56. The slack in the armor portion 86 is not great enough to allow the separable portion 58 to move until it falls off the rod 84.

Steering of the unit is accomplished by another link mechanism 92 connected to a protrusion 94 mounted on the nozzle 72, which pivots horizontally to orient the nozzle to steer the unit. You are free. FIG. 3 illustrates another embodiment that utilizes another form of separating mechanism that is pivotable rather than slidable. For this purpose, it is necessary to have a hinged connection 96 on one side and only one clamp 60 on the other side. By using the pivotable connection described above, the drive shaft 78 and the rotor blades are interconnected to separate due to the angular movement of the rotor blade relative to the drive shaft 78.

According to another important aspect of the invention, the ease of access to the main passages 46 of the rotor and the unit allows
When the separable parts 58 are separated, the advantage is obtained that the cooling device can be easily accessed. As is known to jet propulsion unit designers, power heads are often cooled with ambient water drawn into internal cooling tubes or passages. The coolant circulates throughout the cooling tube to dissipate the heat generated by the power head. The device is described in US Pat. No. 5,049,101, which is incorporated by reference. In order to prevent corrosion of the cooling cylinder and other parts of the power head, it is recommended to provide a device for cleaning the cooling device with fresh tap water. This treatment is especially recommended when the propulsion unit 10 operates in salt water or contaminated water. The cooling device of the power head 12 has the above-mentioned cooling cylinder and an internal port for sending cooling water to the main passage 46 downstream of the rotor blades. This port is designated by the reference numeral 98 on the fixed part 56 and allows the separable part 5 when the fixed part and the separable part are pressed.
8 communicates with the integrally extending port. However, when the separable portion 58 separates, the port 98 is exposed and adapted to insert a fitting therein and, if necessary, water is expelled therefrom to flow back through the cooling device.

Referring to FIG. 4, an ordinary gardening hose 1
02 is provided with a fitting 100 adapted to be threadedly connected, the fitting having a small tube portion 104 having an outer diameter slightly smaller than the inner diameter of the port 98. In addition, the small tubing 104 has an O-ring seal 106 that provides a sealing engagement between the tubing 104 and the port 98. In FIG. 5 the mounting is shown mounted for backflow.

Referring to FIGS. 6-8, another feature of the jet propulsion unit 10 of the present invention is shown. This feature relates to maintaining the coolant in the power head cooling cylinder at a specific pressure. In the unit 10, the cooling water supplied to the power head 12 is diverted from the flow of the high pressure water in the main passage 46 generated by the rotary vanes 74. Unit 1
Due to the relatively high pressure generated by 0, the cooling water diverted to the power unit may exceed the capacity of the cooling cylinder. To control the pressure of the coolant delivered to the power head, a pressure relief valve, generally indicated at 110, is mounted on the rotor housing 18 and is in fluid communication with the cooling cylinder.

More specifically, the stern end of the rotor housing 18 has a port 1 communicating with a fluid passage 116.
There is a valve chamber 112 with 14
Depart from passage 46 through 6. Water is forced by the impeller 74 into the inlet port of the passage 116 at high pressure. Moreover, the valve chamber 112 has at least one, and preferably two, pressure relief ports 120 and is in fluid communication with a pressure relief outlet opening 122 on the outside of the rotor housing.

The valve chamber 112 is sized to accommodate the valve 110, which is preferably a check valve having a threaded plug 124 with an axially extending protrusion 126.
The plug 124 is preferably threadably engaged with the valve chamber 112. The coil spring 128 is supported by the protrusion 126 at a position aligned in the valve chamber 112 in the axial direction. Spring 1
28 is between the plug 124 and a ball 130, preferably made of a hard, corrosion resistant material such as stainless steel.

During normal operation of propulsion unit 10, ball 130 is urged by spring 128 against pedestal 132 defined by port 114. The installed relationship of such balls closes the valve chamber 112 from the coolant passage 116. If the pressure of the coolant pumped through the passage by the rotor vanes exceeds the biasing force of the spring 128, the ball will be pushed aft in the valve chamber 112. Once the ball leaves the pedestal, water enters the valve chamber 112 and is diverted to the pressure relief port 120. Eventually, the extra pressurized coolant is discharged through the blowout opening 122. The separation point of the ball 130 is the spring 128.
It will be appreciated that this can be controlled by the strength of the.

[0032]

It should be understood from the above description that the improved marine propulsion unit according to the present invention has the significant advantage of being accessible from the outside of the ship in which the device is implemented. There is. The ease of access from the outside greatly facilitates the removal of debris from the main waterway and the rotor itself. The design and configuration that allows for easy access disconnects the drive shaft that is connected to the rotor during normal operation, which makes it easier to remove debris that may wind around the drive shaft and rotor. Be converted. With this design, the power head cooling system
It can be cleaned by simply plugging in the hose-attached fitting in the exposed port of the unit. Moreover, the pressure of the coolant diverted from the rotor housing to the power head is
Maintained by a pressure relief valve that prevents damage to the power head.

While various embodiments of the invention have been shown and described, various modifications, substitutions and equivalents can be used and the invention is defined by the following claims and patents. It should be understood that it is limited only by the equivalents of the claims. Various features of the invention are set forth in the following claims.

[Brief description of drawings]

FIG. 1 is a perspective view of a marine power head and a marine propulsion unit according to the present invention.

2 is an exploded perspective side view of a portion of the marine propulsion unit shown in FIG. 1 taken from the opposite side of the assembly with a portion removed.

FIG. 3 is a perspective side view of another embodiment of the marine propulsion unit.

FIG. 4 is a perspective view of a cleaning device used for cleaning the cooling device of the power head according to the preferred embodiment of the present invention.

5 is a perspective view similar to FIG. 2, showing a cleaning device implemented for use in a marine propulsion unit.

FIG. 6 is an exploded perspective side view showing a pressure safety valve of a rotor blade housing of a propulsion unit of the present invention.

FIG. 7 is a schematic vertical sectional view of a rotor blade housing of a propulsion unit of the present invention.

FIG. 8 is an enlarged partial cross-sectional view of the pressure relief valve mounted on the rotor housing.

[Explanation of Codes] 10 Marine Jet Propulsion Unit 12 Power Head 14 Pump Unit 16 Gear Housing 18 Rotor Blade Housing 20 Transom 22 Reverse Gate 23 Engine Block 24 Air Silencer 26 Fuel Pump 28 Fuel Filter 30 Electric Starter 32 Flywheel Assembly Solid 34 Muffler 38 End of gear housing on bow side 40 End of stern of gear housing 42 Lower side surface 44 Upper surface 46 Main passage 48 Transom plate 50 Exhaust hose 52 Ride plate 54 Lower end 56 Bow side 58 Separable part 60 Clamp 62 Hook part 64 Post 66 Gear shift cable 68,92 Link mechanism 70 Opening part (grommet) 72 Nozzle part 74 Rotor blade 76 Stationary blade 78 Output drive shaft 80 Key groove 82 Expansion part 84 Lock Do 86 Armoring part 88 Mounting part 90 Holding member 94 Projection part 98,114 Port 100 Mounting part 102 Garden hose 104 Pipe part 110 Safety valve 112 Valve chamber 116 Passage 120 Pressure safety port 122 Pressure safety outlet 124 Threaded plug 126 Projection Part 128 coil spring 130 ball 132 pedestal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Duein E Rogers United States Wisconsin 53142 Kenosha Eight Force Street 10901 (72) Inventor Charles B. Hall Illinois 60041 Ingleside North Wilson Road 35550 (72) Invention Robert Mooney United States Wisconsin 53154 Oak Creek East Oak Wood Road 940 (72) Inventor W. Scott Craig United States Wisconsin 53142 Kenosha 8th Third Place 5723 (72) Inventor Dean Piebergman United States Illinois 60085 Woukgan Sheridan・ Co 101 address

Claims (31)

[Claims] 1. A power head having an output drive shaft for powering a marine vessel propulsion unit; rotor means for flowing water to a unit for advancing a vessel; and an intake housing having a mounting structure for the power head. The rotor means comprises
A rotor housing having a passage therein, and a rotatable rotor attached to the housing and within the passage, the rotor housing connected to the intake housing, the intake housing comprising the rotor A water intake passage communicating with a passage in the housing for receiving water from an adjacent unit; and further comprising a directional discharge nozzle means mounted at the rear of the rotor housing, the nozzle means discharging from the unit during operation. Is adapted to adjustably control the direction of the water carried; the rotor is removably connected to the power head and the interior of the rotor housing is accessible from outside the unit. A marine jet propulsion unit, wherein at least a portion of the rotor housing is moveable relative to the intake housing. 2. A first side of the portion of the rotor housing is hingedly connected to the remaining portion such that the portion pivots away from the remaining portion, the rotor 2. The portion of the rotor head as it leaves the power head as it swivels away, thereby exposing the rotor blade and removing debris and the like from within the rotor housing and from the rotor blade. Jet propulsion unit. 3. A jet propulsion unit according to claim 2, further comprising latching means adapted to removably mount said portion to said remaining portion and on a side opposite said first side. 4. The portion of the rotor housing is
The portion is slidably connected to the remaining portion so that it can be separated from the remaining portion, and the rotor blades are disconnected from the power head when the portion is released, thereby The jet propulsion unit of claim 1, wherein the rotor vane is exposed to remove debris and debris from within the rotor housing and from the rotor vane. 5. One of said portion and said remaining portion has at least two rod members, the other has cooperating apertures through which said rod members can slide, said portion having said A jet propulsion unit according to claim 4, wherein said jet member is movable relative to said remaining portion by said rod member sliding against a cooperating aperture. 6. Further comprising at least one latching means adapted to removably attach said portion to said remaining portion, said latching means being adapted to move said portion relative to said remaining portion. The jet propulsion unit according to claim 5, which stops. 7. The jet propulsion unit of claim 6, further comprising latching means on opposite sides of said portion. 8. A jet propulsion unit according to claim 1, wherein said discharge nozzle means comprises a part which is adapted to turn the water discharged during steering to the left and right and which is pivotable in a substantially horizontal direction. 9. The discharge nozzle means includes adjustable deflecting gate means adapted to divert at least a portion of the discharged water in generally opposite directions, the position of the gate being forward, backward. The jet propulsion unit according to claim 8, wherein one of the direction and the neutral position is selectively determined. 10. The power head comprises an internal combustion engine having an output drive shaft oriented substantially vertically, the engine being water cooled and cooling water in the intake housing aligned with and communicating with a port of the rotor housing. A water outlet port, the water outlet port of the rotor housing passing the cooling water through the passage with the rotor blade, the water outlet port of the water intake housing moving the portion of the rotor housing relative to the water intake housing. Jet propulsion according to claim 1, wherein the interior of the rotor housing is exposed for connection to a mount adapted to communicate with a source of cleaning fluid when the interior of the rotor housing is accessible from outside the unit. unit. 11. The mounting part has a coupling part adapted to be connected to a flexible hose and a sealing means on its outside frictionally mounted on the inside of the drainage port of the intake housing. A hollow tube as claimed in claim 1.
0 jet propulsion unit. 12. An internal combustion power head having an output drive shaft for powering a pump; a structure adapted to be mounted on a ship and being substantially within the ship and coupled to the power head. With a first part and a second part outside the vessel
A housing having an intake passage for receiving water from an adjacent pump; and pouring water into a pump rotatably mounted in the passage of the second portion for propelling the vessel. Rotor means; having a power output drive shaft removably connected to the rotor means and being primarily supported on the first portion, the power output drive shaft extending to the second portion Connection means for connecting the output drive shaft to the rotor means; directional control mounted on the rear of the second part and adapted to adjustably control the direction in which water is discharged from the pump. Discharge nozzle means, the rotor means being removably connected to the power output drive shaft of the second part such that the interior of the second part is accessible from the outside of the pump. At least a portion relative to the first portion A mobile jet pump that can move. 13. The portion of the second portion is hingedly connected to the remaining portion at its first side so that the portion can pivot away from the remaining portion, and the rotation A wing separates from the power output drive shaft as the portion pivots away, thereby exposing the rotor blade,
13. The jet pump of claim 12, which is capable of removing debris and debris from inside the second portion and from the rotor blades. 14. A jet pump according to claim 13, further comprising latching means on a side opposite the first side and adapted to removably attach the portion to the remaining portion. . 15. The portion of the second portion is slidably connected to the remainder of the second portion so that the portion can be separated from the remainder of the second portion, and the rotor blade is configured to move when the portion leaves. 13. The jet pump of claim 12, wherein the jet pump may be spaced from the power output drive shaft, thereby exposing the rotor blade and removing debris and the like from within the second portion and from the rotor blade. 16. One of said portion and said remaining portion has at least two rod members, the other has cooperating apertures through which said rod members can slide, said portion comprising 16. The jet pump according to claim 15, wherein the jet member is movable relative to the remaining portion by the rod member sliding against the cooperating aperture. 17. Further comprising at least one latching means adapted to removably attach said portion to said second portion, said latching means being adapted to move said portion relative to said remaining portion. The jet pump according to claim 15, wherein the jet pump is stopped. 18. A jet pump according to claim 17, further comprising latching means on opposite sides of said portion. 19. A jet pump according to claim 12, wherein said discharge nozzle means comprises a substantially horizontal swivel portion adapted to direct the water discharged during steering to the left and right. 20. The discharge nozzle means comprises adjustable deflection gate means adapted to divert at least a portion of the discharged water in generally opposite directions, the position of the gate being forward, backward. The jet pump according to claim 19, wherein one of the direction and the neutral position is selectively determined. 21. The internal combustion power head has an output drive shaft oriented substantially vertically, the power head being water cooled and aligned with the port of the first portion. A cooling water discharge port communicating with the second water discharge port, the cooling water being passed through the passage including the rotary blade;
The water outlet port of the first part supplies the cleaning liquid when the part of the second part is moved relative to the first part and the inside of the second part is accessible from outside the pump. 13. The jet pump of claim 12, exposed for connection to a mount adapted to connect to a source. 22. The attachment portion is a coupling portion adapted to be connected to a flexible hose and an outer portion thereof adapted to be frictionally attached to an inner side of a water discharge port of the first portion. 22. The jet pump according to claim 21, further comprising a hollow tube having a sealing means in the interior thereof. 23. A power head having a cooling cylinder; a pump unit connected to the power head for supplying a coolant to the power head; connected to the pump unit to access the cooling cylinder to supply a cleaning liquid thereto. A jet propulsion unit for ships, which consists of access means to be taken inside. 24. The pump unit includes a rotor housing having a separable portion, and the access means communicates with the cooling barrel that is accessible when the separable portion leaves the pump unit. The jet propulsion unit according to claim 23, comprising: 25. The access means of claim 24, further comprising a fitting adapted to connect to a source of cleaning fluid, the fitting including a tubing portion configured to be removably inserted into the internal port. Jet propulsion unit. 26. The jet propulsion unit according to claim 25, wherein the pipe portion is provided with a sealing means for sealing the pipe to the port. 27. The jet propulsion system of claim 23, further comprising a mount adapted to connect to a source of cleaning liquid and configured to removably connect to the pump unit for introducing cleaning liquid into the cooling barrel. unit. 28. A power head having a cooling cylinder for powering the unit; rotary blade means connected to the power head and configured to flow water to the unit for advancing a ship; water for the rotary blade Means for supplying water to the means, the rotor means having a rotor housing having a passage therein, and a rotatable rotor attached to the housing in the passage, A jet propulsion unit for a marine vessel, wherein the vane housing includes a passageway connected to the water intake means and in fluid communication with the cooling cylinder, the water being pressed into the passageway by the rotor vane. 29. The pressure safety means is fluidly connected to a pressure control check valve installed in the rotor housing in fluid communication with the passage, and to the valve for draining excess water from the passage. 29. The jet propulsion unit of claim 28, having at least one pressure relief port in communication therewith. 30. The check valve comprises a spring-biased ball put in place by a plug.
9. The jet propulsion unit according to item 9. 31. The jet propulsion unit of claim 29, further comprising a valve chamber within the rotor housing configured to receive the valve and to have the at least one pressure relief port.